Решение и ответ:
[tex]\displaystyle -{\left({-2\frac{1}{3}}\right)^{-2}}=-{\left({-\frac{7}{3}}\right)^{-2}}=-{\left({-\frac{3}{7}}\right)^2}=-\left({\frac{9}{{49}}}\right)=-\frac{9}{{49}}[/tex]
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Answers & Comments
Решение и ответ:
[tex]\displaystyle -{\left({-2\frac{1}{3}}\right)^{-2}}=-{\left({-\frac{7}{3}}\right)^{-2}}=-{\left({-\frac{3}{7}}\right)^2}=-\left({\frac{9}{{49}}}\right)=-\frac{9}{{49}}[/tex]